#mainLogin{
   width:400px;
    margin: 100px auto;
    border: 1px solid #ccc;
    border-radius: 10px;
    padding: 10px;
    background: #cccccc;
}
body{
    background-image: linear-gradient(#66f 0%,#ccc 100%);
}
html{
    height: 100%;
}
h2{
    position: relative;
    top: 1px;
    text-align: center;
}
footer{
    position: absolute;
    text-align: center;
    bottom: 20px;
    width: 100%;
}